I have been using microsoft outlook for a few years with a hotmail account.
Recently all my calendar items disappeared, all my contacts were deleted and
the send and receive button was removed. I am able to view the emails that I
had previously downloaded but unable to send or receive new emails.
Furthermore I cant seem to add or delete accounts. Does annyone have any
ideas what the problem might be.

Furthermore, when trying to open an outlook data file (which may contain my
calendar etc) it says 'out of memory or system resources'. I am not sure if
this is part of the same problem.

I would be very grateful for any help/advice.